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Known exploited vulnerabilities

ONLYOFFICE vulnerabilities attackers have used

Every ONLYOFFICE vulnerability in CISA's Known Exploited Vulnerabilities catalog, newest first, with the federal due date and whether it fed ransomware campaigns.

The short answer

CISA lists 1 ONLYOFFICE vulnerability as exploited in the wild, 1 of them added in the last 12 months. The most recent is CVE-2021-3199, added Oct 8, 2026. Docs has the most entries (1).

In KEV, all time
1
Added, last 12 months
1
Used in ransomware
0
New CVEs this week
0

Every ONLYOFFICE entry in CISA KEV

  1. CVE-2021-3199

    Added · due

    ONLYOFFICE Docs Server Path Traversal Vulnerability

    ONLYOFFICE Docs contains a path traversal vulnerability that can occur when JWT is used, via a /.. sequence in an image upload parameter and could allow for remote code execution.

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